Look at the various plans available and determine which type of chair you would like. Aaadirondackchairs.com is one website that has many plans available for free. Look at the pictures carefully and determine what would look best with the pieces you already have. Consider your level of experience with building furniture. If you've never built furniture before, you may want to start with a simpler style such as a children's chair.
Carefully read the plans for the chair you have decided to build. Ask yourself whether you have enough experience to build this chair, or if you will need assistance doing so. Determine what tools will be necessary for this project. Do you have everything that is needed, or will you be able to borrow equipment from a friend if needed? Will you need to purchase additional tools to complete the project?
Determine where you are going to build your chair. If you have a workshop or garage, this would be ideal. If you will be building your chair outdoors, look at the area around it. Are there obstacles in the location that would get in your way? Consider whether you need a power source, and if once is readily available. Think about when you will do most of the work on your project. If you are going to be working at night, will there be enough light in this area to do your work, or will you need additional lighting?
Now that you have a plan of action, you are ready to begin building your chair. Plan in stages so that it will not be difficult to pick up where you have left off. How much time do you have each day to devote to building this chair? Think about what you can reasonably be expected to accomplish in this amount of time. When would you like the chair to be completed? If you are planning a get-together in your backyard, you will want your chair to be finished at this time. How far in advance will you need to start your project so that it will be completed in plenty of time?
Once your chair is completed, you can sit back, relax, and think about the next piece of furniture you will build. Building an Adirondack chair can no doubt be challenging, but you will enjoy the fruits of your labor for many seasons to come.